Characters
Cam thinks that if he were straight, he and Julia Roberts would be dating.
— Mitchell Pritchett • Modern Family

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker reports that Cam believes that, if he were straight, he and Julia Roberts would be a couple. The remark gently mocks a grand, unlikely fantasy, treating a celebrity match as a matter of simple orientation and turning it into a joke about inflated self-belief.
Context reviewed